package com.sky.interceptor;

import com.sky.context.BaseContext;
import com.sky.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
@Slf4j
public class JwtTokenUserInterceptor implements HandlerInterceptor {

    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }
        //从请求头获取token
        String token = request.getHeader("authentication");
        //校验token是否有效
        if (token==null){
            //否则，发送未认证错误信息
            response.setStatus(HttpStatus.UNAUTHORIZED.value());
            return false;
        }
        Claims claimsBody = JwtUtil.getClaimsBody(token);
        int i = JwtUtil.verifyToken(claimsBody);
        if (i==0||i==-1){
            Integer id=(Integer)claimsBody.get("id");
            BaseContext.setCurrentId(id.longValue());
            return true;
        } else{

            //否则，发送未认证错误信息
            response.setStatus(401);
            return false;
        }
    }

}


